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Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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Sub-1V Series-Tuned Differential Colpitts VCO with Quarter Wavelength Microstrip Line Current Sources

1/4 파장 마이크로스트립 라인을 전류원을 갖는 서브-1V 직렬공진 차동 콜피츠 전압제어 발진기

  • Jeon, Man-Young (Dept. of Information and Communications Engineering, Dongyang University)
  • Received : 2014.11.23
  • Accepted : 2014.12.24
  • Published : 2014.12.31
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Abstract

This study derives the asymptotic phase noise formula of the oscillators perturbed by the colored noises. Based on the derived formula, this study presents a sub-1V series-tuned differential Colpitts VCO. The ADS simulation result on the phase noise shows that the presented VCO exhibits about 3dBc/Hz lower phase noise at the 1MHz offset frequency from the oscillation frequency of 4.8GHz than the existing series-tuned differential Colpitts VCO with the inductor current sources.

본 연구에서는 컬러잡음에 의해서 교란되는 발진기의 점근적 위상잡음 공식을 유도하고 이에 근거하여 1/4 파장 마이크로스트립 라인을 전류원으로 갖는 서브-1V 직렬공진 차동 콜피츠 전압제어 발진기를 제안한다. 위상잡음에 관한 ADS 시뮬레이션 결과는 제안된 전압제어 발진기가 기존의 인덕터를 전류원으로 갖는 서브-1V 직렬공진 차동 콜피츠 전압제어 발진기보다 4.8GHz 발진주파수의 1MHz 오프셋 주파수에서 약 3dBc/Hz 더 낮은 위상잡음을 나타냄을 보인다.

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References

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